6638S-433-202 Bourns Inc., 6638S-433-202 Datasheet
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6638S-433-202
Manufacturer Part Number
6638S-433-202
Description
PRECISION POTENTIOMETER
Manufacturer
Bourns Inc.
Datasheet
1.6638S-433-202.pdf
(1 pages)
Specifications of 6638S-433-202
Voltage Rating
750VAC
Leaded Process Compatible
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Standard Resistance Range....................................................................................1 K to 100 K ohms
Total Resistance Tolerance .........................................................................................................±10 %
Independent Linearity ...................................................................................................................±1 %
Effective Electrical Angle .......................................................................................................340 ° ±3 °
End Voltage .................................................................................................................0.5 % maximum
Output Smoothness ....................................................................................................0.1 % maximum
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less)
Insulation Resistance (500 VDC)..................................................................1,000 megohms minimum
Resolution..................................................................................................................Essentially infinite
Operating Temperature Range...................................................................................+1 °C to +125 °C
Storage Temperature Range.....................................................................................-65 °C to +125 °C
Temperature Coefficient Over Storage Temperature Range ...........................±500 ppm/°C maximum
Vibration .........................................................................................................................................15 G
Shock .............................................................................................................................................50 G
Load Life .................................................................................................................1,000 hours, 1 watt
Rotational Life (No Load) .........................................................................20,000,000 shaft revolutions
Moisture Resistance (MIL-STD-202, Method 106)
IP Rating ........................................................................................................................................IP 40
Mechanical Angle ................................................................................................................Continuous
Torque (Starting & Running) ............................................................0.18 N-cm (0.25 oz.-in.) maximum
Shaft Runout................................................................................................0.025 mm (0.001 in.) T.I.R.
Shaft End Play ...............................................................................................0.13 mm (0.005 in.) T.I.R.
Shaft Radial Play ...........................................................................................0.08 mm (0.003 in.) T.I.R.
Backlash ........................................................................................................................0.1 º maximum
Weight ..........................................................................................................................................18 gm
Terminals.......................................................................................................................Rear turret type
Soldering Condition
Marking ................................Manufacturer’s name and part number, resistance value and tolerance,
Ganging (Multiple Section Potentiometers) .................................................................1 cup maximum
Hardware ...................................................One lockwasher (H-37-1) and one mounting unit (H-38-1)
1
At room ambient: +25 °C nominal and 50 % relative humidity, except as noted.
Electrical Characteristics
Environmental Characteristics
Mechanical Characteristics
Sea Level .............................................................................................................750 VAC minimum
+70 °C......................................................................................................................................1 watt
+125 °C....................................................................................................................................0 watt
Wiper Bounce ...........................................................................................0.1 millisecond maximum
Total Resistance Shift ..............................................................................................±5 % maximum
Voltage Ratio Shift ................................................................................................±0.5 % maximum
Wiper Bounce ...........................................................................................0.1 millisecond maximum
Total Resistance Shift ..............................................................................................±5 % maximum
Voltage Ratio Shift ................................................................................................±0.5 % maximum
Total Resistance Shift ............................................................................................±10 % maximum
Total Resistance Shift ............................................................................................±10 % maximum
Total Resistance Shift ............................................................................................±10 % maximum
Mounting.............................................................................170-200 N-cm (15-18 lb.-in.) maximum
Manual Soldering................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire
Wave Soldering ........................................................96.5Sn/3.0Ag/0.5Cu solder with no-clean flux
Wash processes ..................................................................................................Not recommended
1
1
1
linearity tolerance, wiring diagram, and date code
6638 - Precision Potentiometer
Features
7/8 ” (22 mm) diameter single-turn
conductive plastic
Bushing mount
Excellent resolution
High rotational life – ball bearing
shaft support
is shipped with each potentiometer.
370 °C (700 °F) max. for 3 seconds
260 °C (500 °F) max. for 5 seconds
Customers should verify actual device performance in their specific applications.
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
22.23
(7/8)
6638
7/8 " (22 mm) DIA.
(.537 ± .015)
DIA.
13.64 ± .38
Recommended Part Numbers
Product Dimensions
6638S-1-102
6638S-1-502
6638S-1-103
Part Numbers
Non-standard features and
specifications available
Specifications are subject to change without notice.
CCW
1
TOLERANCES: EXCEPT WHERE NOTED
DECIMALS: .XX ±
FRACTIONS: ±1/64
DIMENSIONS:
(.062)
(1/8)
1.57
3.18
CLOCKWISE
(.20)
5.08
R
(IN.)
MM
(.015)
2
45 ° ± 5 °
(.281+.000/-.002)
.38
(.02),
7.14 + .00/- .05
.51
WIPER
1/4"-32 UNEF-THD
22.23
(7/8)
(.032)
.XXX ±
3
Resistance
.81
(3/8)
(.1248+.0000/.0003)
9.53
1,000
5,000
10,000
3.170 + .000/-.008
45 ° ± 5° X (.010)
CHAMFER
SHAFT SLOT
WIDE X
(Ω)
2
(.005)
.127
3
DIA.
CW
REV. 10/08
CW
1
(.032)
.81
.25
DEEP
DIA.